Crash

---- Minecraft Crash Report ----
// Why is it breaking :(

Time: 4/6/16 9:54 PM
Description: Ticking block entity

java.lang.IllegalArgumentException: At least one of the nodes must already be in this network.
	at li.cil.oc.server.network.Network.connect(Network.scala:81)
	at li.cil.oc.server.network.Network$Wrapper.connect(Network.scala:752)
	at li.cil.oc.server.network.Node$class.connect(Node.scala:38)
	at li.cil.oc.server.network.Network$ComponentConnectorBuilder$$anon$1.connect(Network.scala:636)
	at li.cil.oc.server.machine.Machine$$anonfun$tryClose$2.apply(Machine.scala:839)
	at li.cil.oc.server.machine.Machine$$anonfun$tryClose$2.apply(Machine.scala:839)
	at scala.Option.foreach(Option.scala:245)
	at li.cil.oc.server.machine.Machine.tryClose(Machine.scala:839)
	at li.cil.oc.server.machine.Machine.update(Machine.scala:558)
	at li.cil.oc.common.tileentity.traits.Computer$class.updateComputer(Computer.scala:127)
	at li.cil.oc.common.tileentity.Case.updateComputer(Case.scala:19)
	at li.cil.oc.common.tileentity.traits.Computer$class.updateEntity(Computer.scala:110)
	at li.cil.oc.common.tileentity.Case.func_145845_h(Case.scala:53)
	at net.minecraft.world.World.func_72939_s(World.java:1939)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:636)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
	at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:111)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
	at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at li.cil.oc.server.network.Network.connect(Network.scala:81)
	at li.cil.oc.server.network.Network$Wrapper.connect(Network.scala:752)
	at li.cil.oc.server.network.Node$class.connect(Node.scala:38)
	at li.cil.oc.server.network.Network$ComponentConnectorBuilder$$anon$1.connect(Network.scala:636)
	at li.cil.oc.server.machine.Machine$$anonfun$tryClose$2.apply(Machine.scala:839)
	at li.cil.oc.server.machine.Machine$$anonfun$tryClose$2.apply(Machine.scala:839)
	at scala.Option.foreach(Option.scala:245)
	at li.cil.oc.server.machine.Machine.tryClose(Machine.scala:839)
	at li.cil.oc.server.machine.Machine.update(Machine.scala:558)
	at li.cil.oc.common.tileentity.traits.Computer$class.updateComputer(Computer.scala:127)
	at li.cil.oc.common.tileentity.Case.updateComputer(Case.scala:19)
	at li.cil.oc.common.tileentity.traits.Computer$class.updateEntity(Computer.scala:110)
	at li.cil.oc.common.tileentity.Case.func_145845_h(Case.scala:53)

-- Block entity being ticked --
Details:
	Name: oc:case // li.cil.oc.common.tileentity.Case
	Block type: ID #462 (tile.oc.caseCreative // li.cil.oc.common.block.Case)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (-1537,53,-486), Chunk: (at 15,3,10 in -97,-31; contains blocks -1552,0,-496 to -1537,255,-481), Region: (-4,-1; contains chunks -128,-32 to -97,-1, blocks -2048,0,-512 to -1537,255,-1)
	Actual block type: ID #462 (tile.oc.caseCreative // li.cil.oc.common.block.Case)
	Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
	at net.minecraft.world.World.func_72939_s(World.java:1939)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:489)